Visible and far-infrared spectroscopic studies of Co-doped (80–x)Sb2O3–20Na2O–xWO3glasses

Petkova, P.; Soltani, Mohamed Toufik; Petkov, S.; Tacheva, J; Nedkov, V.

doi:10.1088/0031-8949/2012/t149/014057

Cited by 8 publications

(7 citation statements)

References 9 publications

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“…The β phase has an orthorhombic unit cell, composed of four connected bent rings of E SbO 3 but in a layer-chained structure instead of a molecular structure (see Figure b). β-Sb 2 O 3 is an essential component in Sb 2 O 3 –B 2 O 3 glasses that enhances nonlinear optical properties. − …”

Section: Introductionmentioning

confidence: 99%

Phonon Spectroscopy in Antimony and Tellurium Oxides

et al. 2020

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α-Sb 2 O 3 (senarmontite), β-Sb 2 O 3 (valentinite), and α-TeO 2 (paratellurite) are compounds with pronounced stereochemically active Sb and Te lone pairs. The vibrational and lattice properties of each have been previously studied but often lead to incomplete or unreliable results due to modes being inactive in infrared or Raman spectroscopy. Here, we present a study of the relationship between bonding and lattice dynamics of these compounds. Mossbauer spectroscopy is used to study the structure of Sb in α-Sb 2 O 3 and β-Sb 2 O 3 , whereas the vibrational modes of Sb and Te for each oxide are investigated using nuclear inelastic scattering, and further information on O vibrational modes is obtained using inelastic neutron scattering. Additionally, vibrational frequencies obtained by density functional theory (DFT) calculations are compared with experimental results in order to assess the validity of the utilized functional. Good agreement was found between DFT-calculated and experimental density of phonon states with a 7% scaling factor. The Sb−O−Sb wagging mode of α-Sb 2 O 3 whose frequency was not clear in most previous studies is experimentally observed for the first time at ∼340 cm −1 . Softer lattice vibrational modes occur in orthorhombic β-Sb 2 O 3 compared to cubic α-Sb 2 O 3 , indicating that the antimony bonds are weakened upon transforming from the molecular α phase to the layer-chained β structure. The resulting vibrational entropy increase of 0.45 ± 0.1 k B /Sb 2 O 3 at 880 K accounts for about half of the α−β transition entropy. The comparison of experimental and theoretical approaches presented here provides a detailed picture of the lattice dynamics in these oxides beyond the zone center and shows that the accuracy of DFT is sufficient for future calculations of similar material structures.

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Section: Introductionmentioning

confidence: 99%

Phonon Spectroscopy in Antimony and Tellurium Oxides

et al. 2020

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“…Numerous Sb2O3-based binary and multi-component glasses including conventional glass formers have been reported in the literature [1,[16][17][18][19][20][21]. Therefore, recently alkali antimonite glasses free of conventional glass formers have been the subject of some studies in different systems such as; Sb2O3-Na2O-ZnO, Sb2O3-M2O-MoO3 (where M = Li, K), Sb2O3-Li2O-GeO2, Sb2O3-Na2O-WO3-Bi2O3, Sb2O3-M2O-PbO (where M = Li, Na or K), Sb2O3-Na2O-WO3 and Sb2O3-Na2O-Al2O3 [1][2][3][4][5]14,15,[22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Characterization of new Sb 2 O 3 -based multicomponent heavy metal oxide glasses

Ersundu

Çelikbilek

Baazouzi

et al. 2014

Journal of Alloys and Compounds

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New Sb2O3-based multicomponent heavy metal oxide glasses in the Sb2O3-Na2O-WO3-PbO system were prepared using a conventional melt-quenching technique. Glass formation behavior of these glasses and their thermal, physical and structural properties were investigated using X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDS), differential scanning calorimetry (DSC), UV-Vis-NIR spectroscopy and Fourier transform infrared (FTIR) spectroscopy analyses according to the increasing PbO concentration by keeping the Sb2O3/WO3 ratio constant. Thermal analysis of the glasses were realized in terms of glass transition temperature (Tg), crystallization temperature (Tc/Tp), glass stability against crystallization (∆T), activation energy of the glass transition reaction (Eg) and fragility parameter (m). Density (ρ), molar volume (VM), oxygen molar volume (VO), oxygen packing density (OPD), refractive index, band gap energy (Eg), average cross-link density (c n), number of bonds per unit volume (nb) and Poisson's ratio (μcal) values were calculated for the interpretation of physical and structural properties of the glasses. FTIR spectra of the glasses were evaluated in terms of structural transformations on the glass network.

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“…This work focuses on finding new host matrices for the rare earth ions, as their spectroscopic properties are largely used for making optical amplifiers and solid-state lasers. Among the new materials that have been widely studied in recent years, antimony oxide glasses have attracted large attention for their potential applications, especially in the field of optical amplification in the telecommunication C-band (1530-1560 nm) [1][2][3][4][5][6]. This group of glasses appears as one major family of Heavy Metal Oxide Glasses (HMOG).…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic properties of Er3+-doped antimony oxide glass

Ouannes

Soltani

Poulain

et al. 2014

Journal of Alloys and Compounds

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International audienceSpectroscopic properties of Er3+ ions have been studied in the 60Sb2O3-20WO3-19Na2O-1Bi2O3 (SWNB) glasses doped with 0.25 and 0.50 mol% Er2O3 respectively. The Judd-Ofelt parameters measured from the absorption spectra have been used to calculate the radiative life-time (τr) and the stimulated emission cross section. The low phonon energy, a reduced quenching effect and a high quantum efficiency of 90% for the 1.53 μm expected laser emission into pumping at 980 nm are in favor of promising material laser application

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Visible and far-infrared spectroscopic studies of Co-doped (80–x)Sb₂O₃–20Na₂O–xWO₃glasses

Cited by 8 publications

References 9 publications

Phonon Spectroscopy in Antimony and Tellurium Oxides

Phonon Spectroscopy in Antimony and Tellurium Oxides

Characterization of new Sb 2 O 3 -based multicomponent heavy metal oxide glasses

Spectroscopic properties of Er3+-doped antimony oxide glass

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